DE1048441B - Exhaust silencers for internal combustion engines - Google Patents

Claims (1)

GERMAN The invention relates to an exhaust muffler for vehicle internal combustion engines of any kind Type that attaches to the end of the exhaust pipe expanded to form a muffler. The silencer according to the present invention has a valve in the flow path of the exhaust gases on. which is brought into the throttle position by spring pressure and opened by the gas pressure. Such Sound attenuating valves have already been described several times. A silencer is also known in which longitudinal channels are formed in a jacket piece through an insert tube are formed as relaxation rooms and in the end faces spring-mounted throttle disks are embedded in the insert tube. The feathers of each Throttle disks act separately from each other and only serve to support each of them resting baffle plate opposite the insert pipe, but not to support the insert pipe on the Mantle piece. According to the invention, at least one valve is now provided by counter-acting helical springs elastically supported on the housing. According to the invention, movable baffles that are flexible against spring pressure open depending on the Pressure of the occurring exhaust gases, like a valve, more or less selecting the passage of the exhaust gases they are still in the rest position when the leading sound wave arrives, i.e. in the position strongest throttling. The invention is explained below with reference to an embodiment which is intended in particular for motorcycles and smaller motor vehicles. In the embodiment shown in the drawing, the silencer is carried by a StutZk-ii 2, the outer widened part 4 'of which is connected by a conical part 5 to the narrower, window-like openings 7 having pipe socket 3. in which the impact and valve surfaces 19, 21 and 22, which are axially displaceable against spring pressure, are guided. The widened part 4 can be firmly connected to the muffler 6 by welding oiler Verseil. In turn, it carries a spring sleeve 9 with an end cap 11 screwed onto the Gewiiideansaiz 10 by means of an Ouerplatte 8, which the two separated by an axially perforated disc 16 act in opposite directions Screw r'edeni 17 and 18 includes. The outer plate 8 and the bottom of the cap 11 are provided with axial bores 13 and 14 in which the bolt-shaped valve carrier 15 is slidably guided. On the \ onlereiide de. " Bolt 15 , the valve 19 is actuated by the screw 26 so that the plate 19 in the exhaust muffler
for internal combustion engines Applicant:
Giuseppe Calabresi, Rome Representative: Dr.-Ing. J. Schmidt, patent attorney,
Munich 13, Hohenzollernplatz 8 Claimed priority:
Italy 13 November 1953 Giuseppe Calabresi, Rome,
has been named as the inventor The rest position of the valve is flush with the outer edge 20 of the pipe socket 3; the sound wave thus hits the valve in the position of the greatest throttling, while the subsequent exhaust gases compress the stronger spring 18 by means of the disk 16 which is fixed on the valve rod 15. As a result, the valve 19 , which is firmly seated on the \ entiNtange, is moved into the position 19 ' , in which the gases can escape noiselessly, whereupon the springs 17 and 18 return to their starting position and there. " Valve 19 is brought back into the closed position. The inventive valve canoe from one or consist of several preferably perforated plates, the perforations 23, 24 and 25 against each other can be offset. After exiting the silencer, the exhaust gases pass through the Pipes 27 and 28 to the outside, which, to a heating to prevent the spring sleeve 9, appropriately diverging is arranged. P. \ τι: \ r. \\ s im: i '<: 11: Exhaust silencer with throttle position brought into throttle position by spring pressure and by gas pressure IXS 1 048 44] opening gas throttle valve or with several such valves, characterized by elastic Support of at least one valve on a housing part by counteracting Coil springs. Considered publications: German Patent Specifications No. 207 444. 642 215, 619,810328; French patent I \ ^T r. 532 483; British Patent No. 383 604. 1 sheet of drawings